/*
 * File    : FMFileUnlimited.java
 * Created : 12-Feb-2004
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.aelitis.azureus.core.diskmanager.file.impl;

/**
 * @author parg
 *
 */

import java.io.File;

import org.gudy.azureus2.core3.util.DirectByteBuffer;

import com.aelitis.azureus.core.diskmanager.file.FMFile;
import com.aelitis.azureus.core.diskmanager.file.FMFileManagerException;
import com.aelitis.azureus.core.diskmanager.file.FMFileOwner;

public class FMFileUnlimited extends FMFileImpl {
    protected FMFileUnlimited(FMFileOwner _owner, FMFileManagerImpl _manager, File _file, int _type)

    throws FMFileManagerException {
        super(_owner, _manager, _file, _type);
    }

    protected FMFileUnlimited(FMFileUnlimited basis)

    throws FMFileManagerException {
        super(basis);
    }

    public FMFile createClone()

    throws FMFileManagerException {
        return (new FMFileUnlimited(this));
    }

    public void setAccessMode(int mode)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            if (mode == getAccessMode() && isOpen()) {

                return;
            }

            setAccessModeSupport(mode);

            if (isOpen()) {

                closeSupport(false);
            }

            openSupport("FMFileUnlimited:setAccessMode");

        } finally {

            this_mon.exit();
        }
    }

    public long getLength()

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:getLength");

            return (getLengthSupport());

        } finally {

            this_mon.exit();
        }
    }

    public void setLength(long length)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:setLength");

            setLengthSupport(length);

        } finally {

            this_mon.exit();
        }
    }

    public void setPieceComplete(int piece_number, DirectByteBuffer piece_data)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            if (isPieceCompleteProcessingNeeded(piece_number)) {

                ensureOpen("FMFileUnlimited:setPieceComplete");

                boolean switched_mode = false;

                if (getAccessMode() != FM_WRITE) {

                    setAccessMode(FM_WRITE);

                    switched_mode = true;

                    // switching mode closes the file...

                    ensureOpen("FMFileUnlimited:setPieceComplete2");
                }

                try {

                    setPieceCompleteSupport(piece_number, piece_data);

                } finally {

                    if (switched_mode) {

                        setAccessMode(FM_READ);
                    }
                }
            }
        } finally {

            this_mon.exit();
        }
    }

    public void read(DirectByteBuffer buffer, long offset)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:read");

            readSupport(buffer, offset);

        } finally {

            this_mon.exit();
        }
    }

    public void read(DirectByteBuffer[] buffers, long offset)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:read");

            readSupport(buffers, offset);

        } finally {

            this_mon.exit();
        }
    }

    public void write(DirectByteBuffer buffer, long position)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:write");

            writeSupport(buffer, position);

        } finally {

            this_mon.exit();
        }
    }

    public void write(DirectByteBuffer[] buffers, long position)

    throws FMFileManagerException {
        try {
            this_mon.enter();

            ensureOpen("FMFileUnlimited:write");

            writeSupport(buffers, position);

        } finally {

            this_mon.exit();
        }
    }

    public void close()

    throws FMFileManagerException {
        try {
            this_mon.enter();

            closeSupport(true);

        } finally {

            this_mon.exit();
        }
    }
}
